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LM386 Low Voltage Audio Power Amplifier IC DIP-8 Package

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Description

The LM386 is an integrated circuit that provides audio amplification in a small and efficient package. It operates on a low supply voltage, typically between 4V and 12V, and delivers up to 700 mW of power to an 8Ω load. The IC is housed in an 8-pin Dual In-line Package (DIP-8), making it easy to integrate into various electronic projects.

One of the key advantages of the LM386 is its ability to operate with very few external components, simplifying the design and assembly of audio circuits.

Features

  • Low Voltage Operation: Works with a supply voltage as low as 4V, making it ideal for battery-powered devices.
  • Adjustable Gain: Gain can be set anywhere from 20 to 200 by adding external resistors or capacitors, providing flexibility in various applications.
  • Low Quiescent Current: Draws very little current (typically 4 mA), which is perfect for low-power applications.
  • High Output Power: Capable of delivering 700 mW into an 8Ω speaker load with a 12V supply.
  • Wide Bandwidth: Provides good audio fidelity with a frequency response from 300 Hz to 20 kHz.
  • Minimal External Components: Requires only a few external components, simplifying circuit design and reducing cost.
  • Built-in Bypass Capacitor: Includes a built-in bypass capacitor that improves stability and reduces noise.
  • Thermal Shutdown Protection: Protects the IC from overheating during operation.

Specifications

  • Output Power: 700 mW (typical) at 8Ω with 12V supply
  • Supply Voltage: 4V to 12V (typical 9V)
  • Quiescent Supply Current: 4 mA (typical)
  • Voltage Gain: Adjustable from 20 to 200
  • Input Impedance: 50 kΩ (typical)
  • Output Impedance: Low output impedance for direct speaker drive
  • Total Harmonic Distortion (THD): Typically 0.2% at 125 mW output
  • Frequency Response: 300 Hz to 20 kHz (±3 dB)
  • Input Bias Current: 250 nA (typical)
  • Power Supply Rejection Ratio (PSRR): 50 dB (typical)
  • Package Type: DIP-8 (Dual In-line Package, 8 pins)
  • Operating Temperature: 0°C to +70°C

Applications

  • Portable Audio Devices: Ideal for battery-powered devices like radios, portable speakers, and intercoms.
  • Headphone Amplifiers: Used in low-power headphone amplifiers for personal audio devices.
  • DIY Audio Projects: Popular among hobbyists for building custom audio amplifiers.
  • Educational Kits: Commonly used in educational electronics kits for learning about audio amplification.
  • Guitar Amplifiers: Often used in small, portable guitar amplifiers for practice and travel.

Note

* Product Images are shown for illustrative purposes only and may differ from actual product

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